- YAM_UT.c, YAM_rexx_rxif.c: changed the bugfix of
bug #596303 on user demand. Previously YAM
did always put the Application to sleep if the Busy()
function was used. This made the usability of the
application a bit too annoying. Now we just put
the application to sleep (showing a busy pointer) if
the APPBUSY arexx command will be used.

- YAM_MA.c/MA_GetRealSubject(): fixed bug where YAM didn`t
correctly return the real subject if a subject line with
brackets hadn`t got any whitespace between the last
bracket and the real subject line. Also slightly optimized
the function a bit.

- YAM_UT.c/Busy(): fixed bug #596303 and brought back the
MUIA_Application_Sleep calls to make the Busy() function work
again like in 2.3. These calls doesn`t seem to harm the
performance anymore (at least with MUI 3.9) like described in
bug #458521. And if so, this is more a problem of old MUI
versions and not ours.